<head>
    <link rel="stylesheet" href="2.css">
</head>
<body>
    <div>
    <div class="top">
        header
    </div>
    <div class="mid">
        <div class="lp">
            aside
        </div>
        <div class="rp">
        section
        </div>
    </div>
    <div class="bottom">
        footer
    </div>
    </div>
    <div class="float">
        floatdiv
    </div>
</body>
